Bluelans&reg; Cool Men's Sport Military Quartz Watch with Faux Leather Strap Case Material: Stainless steel/ Strap Material: Faux Leather Case Diameter: 4.0 cm Strap Width: 2.0 cm / Strap Length: 19.5 cm / Total Length: 23.5 cm Strap Colour: Brown The tachymeter in the dial is just for decoration purpose, does not have real functions.